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Refugee and migrant children pay attention to their teacher inside the Schisto refugee camp in Schisto, Greece on Oct. 4, 2018. World Teacher's Day is held annually on Oct. 5. (Xinhua/Lefteris Partsalis)
Refugee and migrant children pay attention to their teacher inside the Schisto refugee camp in Schisto, Greece on Oct. 4, 2018. World Teacher's Day is held annually on Oct. 5. (Xinhua/Lefteris Partsalis)